The best benefit of forum posting is traffic! If you post something really useful and you placed your signature with your site, I am sure you will generate traffic.
Forum posting is used to share question and answers with others. To create signature for your keyword and to increases the traffic and ranking to your site.
Thanks all sharing your point about forum submission but i have one doubt according to panda 2.1 update forum posting is spam activity so how can do forum ??
Forums are helps to share knowledge throughout world and clear doubts about any matter. It also helps to promote business/website and get quality backlinks for a website.
Forum helps to discuss on a certain topic with the people residing all over the world and to get the best solution of it quickly. It helps to generate instant traffic on a website which helps to increase the sales of it rapidly.